Safety fountain pen



Aug. 19, 1924.` A l w.'HENR|scH SAFETY FOUNTAIN PEN Filed March 10. 1923 Fig. 5

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1 holder7 and, of course, the nib inserted Patented tug. 19, 1924.

unirsi) STATES 1,505,262 PATENT OFFICE.

WILHELM HENaiscH, or eoDnsBEnG, GERMANY.

SAFETY FOUNTAIN PEN.

Application filed March 10,y 1923.

T0 all 'whom t 'may concer/n: i.

Be it lznown that I, VILHELM HENRISOH, a citizen of Germany, residing at Godesberg, Rhineland, Germany, have invented new and useful Improvements in l Safety Fountain on the barrel of the fountain-pen by :meansL of a screw thread cut on the outside of the barrel, such screw-thread providing the.

means of exerting the pull necessary fory hermetically sealing the cap on the "barrel, the present construction does away withk this exterior screw-thread, besides affording a highly accelerated motion of the nib- Same.

The invention is characterized by a screwstem centered in the cap engaging a cylindrical nib-holder, provided on its cylindrical surface with a channel 'following a spiral course and gliding along a peg reaching into same, theV longitudinal motion in theother, toward sealing the junction of the nibholder and barrelmouth ywhen the nib or pen is used in writing. Both ends,

it will be noticed, are attained without the use of a special screwthread7 the means of attaining them consisting simply in flattening the course of the spiral screw channel and thus obtaining the necessary purchase for exerting either a pull or a thrust, the one being required in sealing the barrel by means of the cap, the other coming into play when the cap is taken oft' and the pen protrudes for writing, and all issues must be closed except the feed-channel.

A further special advantage of fountainpens according to the present invention consists in the way the filling of the r'barrel is effected. All that is necessary is, in unscrewing the cap, to exert on it a longitudinal pressure. The consequence of such pressure being to increase the friction of the peg in the spiral course of the nib holder, the effect will be to uiiscrew the stem of the cap from the nibholder and prevent the latter from rising, that is, following the Serial No. 624,063.

cap. y With the nib vholder inside of the barrel the latter iso-pen and the inl: is lled into same in the Way/customary with safety fountain-pens. Thev cap is then screwed iny place andwhen unscrewedy again for writing will be found to function inthe manner intended. o y y In the drawings accompanying and formingpart of this specificationgs. l and 2 are partly sectional side views of aspen embodyingone form of they linvention, Fig.k 1 yshowing the cap in position on the barrel, said cap being omitted. from Fig.2;A y l F-ig. '3 is a vertical sectional view illustrating a modifiedy form of pen, the pen point or nib being shown in withdrawny or inoperative position and the cap in place; and i ing.k 4 is a View Similar to Fig. a, but

and the cap removed.

f .In the Aform of pen, shown in Figures l and 2, a is the nibholder, b being the nib or pen attached inthe usual manner, the

`nibholder being providedwith spiral screw course 0 into which a peg or projection e reaches from the inside of the barrel d. The .n peg .e maybe secured in a ring or annular guide 7 fastened` in the barrel. The cap g, the interior surface of which is smooth and glides on the smooth barrel, is provided with a central stem threaded at its free end it and engaging afemale` thread cut intol the top ofthe nibholder a. A rotary motion being given yto the cap g, such lmotion is communicated to the nibholder owing to the screw-stem connecting thetwo parts and the nibholder, owing to the spiral grooveand the fixed peg reaching into same, receives a longitudinal rmotion upward.

Referring now to Figures 3 and 4, which 4is to say, the second arrangement of parts,

it will be seen that the spiral groove a3, instead of being located on the surface of the nibholder a is transferred to a separate tubular part m placed in the bottom of the shaft or barrel and, if so desired, made as an integral part of the plug or stopper p.

Thenibholder a is provided with an eXten-r sion stem n, the end of which glides in the tubular part fm, and is fitted With a peg c reaching into the spiral groove c of part m.

' A second peg 0 on the stem n servesas a stop relieving the peg e of any excessive strain it may be exposed to. With the nibholder ni showing the ypen point in operative position its bottom position both pegs e and o rest against terminal stops of part m. It will be easily understood that the action of the different parts, that is to say their functioning, is identical in both arrangements. Particularly is this the case ast'othe spiral groove, for, the one shown in the tubular part m has thevk same intermediate steep course as device will be obvious'from theforegoing description. lneither form, as soon asthe nibholderfhas arrived at its eXtreme outerlmost position, 'as' shown 4in Fig.l 4, continued rotary motion of the cap servesto unscrew the steml from the nib holder. The pen isy thusin itsoperative 'position ready for-use,

l"thetopl end of the-nibholdersealing 'the' 'mouth t' o'fthebarr'el'and thus preventing f the ink from escaping except through the"` feed duct usually provided in thenib holder.

The'nib holder is caused to'return toitsinnermost, or inoperative po'si'tionby placin'gthe cap over'I the pien and rotating said cap to cause itsstemtolengagethe threaded openin'gin thenib holder. As soon as said stemlis screwed home-in said opening, theV nib "holder will'rotiate with the continued rotation; of the'cap, which rotation, owing to therp'in'an'd spiral slotl connection between. the nib holder and the barrel, will cause saidv nib holder to descendl intothe barrel. It,V

willfbe noted that the spiral v-gro'ove or slot in both forms' of thev device is materially flattened a'tboth ends, as 'indicated at 01 and c2; The purposeofthisisto exert greater friction on the cooperating pin vand-thusI positively retain 'the' pen ateither of its eX- treme positions. When the barrel isto be filled, Vthe cap can bey removed without raising 'the pen to itsfopera-tive position. This isf accomplished by? eertin'g aj downward" pressure on the cap, as indicated by the arrow la in Fig. l, while rotating the cap in the reverse or anti-clockwise direction. This downward pressure increases the friction between the spiral slot and the peg or pin cooperating therewith and thus permits the unscrewing of the stem 7L from the nib holder, as will be obvious. The barrel can then'befilled with inlr in the usual manner by the use of a dropper, whereupon the cap can be replaced in the manner hereinbefore described. ln the form shown in Figs. l and 2 the `ink passes from'above the nib holder through the channel or duct Z shown in dotted line in said figures, through which duct,- when the pen isin use, the ink flows to the nib. f

The arrangement shown in Figs. l and 2 may be supplemented'by making the plug p a screw-plug to beI unscrewed for filling the barrel vfrom vthe end.

, vWhat I claim as myy invention, and desire to secure by Letters Patent, is the following Y A safety fountain pen, Comprising abarrel lia-vingan open end, a nib holder having a .feed duct` and movable longitudinally in said-barrel and adapted to close the same while kleaving the feed duct unobstructed, one of said members having a spiral groove of less pitch at'its ends than at the-inter- 'mediate portion and the other member having a peg projecting into said groove whereby upon rotation of the nib holder relatively to the barrel the nib fholdervwill be reciprocated within the barrel and supported therebyvthrougout its movement, a cap detachably connected't'o said nib holder, the connections between fthe barrel `and nib holder and between the n-ib holder and cap being such that when the nib holderis at its lowermost position, further rotation of the nibholder willdraw the cap into closer contact with the open end of the barrel thereby to hermetically sealthe saine.

f In testimony whereof I name tel this specification.

' VILHELM HENRISGH.

have signed my 

